Type-writing machine.



H. S. MOCORMAGK.

TYPE WRITING MACHINE.

APPLIOATION FILED 313.11, 190B.

928, 876, Patented July 20, 1909.

2 SHEETBBHEET 1.

f V t 1": T Vztnelssies H. S. MOGORMAGK'.

TYPE WRITING MACHINE.

APPLICATION FILED 313.11, 190a.

Ivy 42 Patented July 20, 1909.

2 SHEETS-BEEET 2.

Inventor;

UNITED STATES PATENT OFFICE.

HARRY S. MCCORMAOK, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD TYPEWRITERCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented July 20, 1909.-

. I Application filed February 11,1908. Serial no. 116,286.

Be it known that I, HARRY S, MOCORMACK, a.citizen of the United States,residing in New York,--in the countyof New York and State of New York,have invented certain new and useful .Improvements in Type-' Vtritin'gMachines, of which the following is a specification. Y

Thi' invention relates to the paper feeding means of ty ewritingmachine's, es ecially those in which a paper clip extends al dng theplaten and is normally open and inactive during the rotation of theplaten, so as to ermit continued revolution of the platen,

independently of the clip the cli being connectlble to the platen torotate t erewith, so that the leading edges of a quantity of sheets maybe readily inserted within the clip and carried thereby around theplaten without disarranging the sheets, as set forth in United StatesPatent No. 850,310.

One of the principal objects of the present invention is to improve theconstructlon and 5 operation of the clip and its controlling mechanism,especially with a view to securing more perfect and satisfactorycontrolof the cl'p, and enabling it to betterperform its functions;

I provide a spring that. is tensioned to the clip against the platen,and I hold thd fiip away from the platen by means-of a trip .or latch.The latter is releasable by means of a finger key provided upon thelatenframe, so that afterintroducingthe eading edges of the sheetswithin the open clip, the operator may, by pressing said key, cause theclip to clamp the sheets against the platen, and also to becomemechanicallyv connected to the platen to rotate therewith. Aftercarrying the leading ed e of the sheets around past the pressure rol sand up past the printing point, the 'clip comes into engagement with acam mounted upon the platen frame, whereby the clip is opened and thesheets released therefrom. As the platen continues to turn forwardly,the clip rides offfrom said cam on to the trip or latch be forementioned, and there remains idly during the subsequent revolution ofthe platen. I further provide aback check to prevent the clip from 'beincarried aroundwith the l-aten when the atter is rotated backwar alsomeans to gage the side edges of t sheets while 'belng introduced.

into. the clip. Other .features and advan tages will hereinafter appear.

In the acco'mpanyin drawings, Figure 1 is an end elevation partly insection of a platen frame of an Underwood front strike writing machineembodying my improvements. Fig. 2 is a similar view, (certain partsbeing omitted) to illustrate the manner of inserting and catching thesheets. Fig. 3 is a perspective rear View of the platen and clip. Fig. 4is a rear elevation of a platen and clip. Fi s. 5 and 6 are rearelevations of one end 0 the platen illustrating the manner of releasingthe clip to permit it to swing against the platen. Figs. 7 and 8 are endelevations to illustrate different stages in the movement ofthe clip. 9is a sectional view of one of the platen frame ends. Fi 10 is a viewsimilar to'Fig. 7, but illustratlng the clip in normal idle position. InFi s. 7, 8 and 10, arts are omitted for the sa 'e of clearness. ig. 11is a part sectional plan of the key for releasing the clip and of thecam for opening the same. springressed tri or latch, whic normally holdst e cli ini le position.

In said nderwood machine herein illustrated, type-bars 1 strikerearwardly against the front side of a cylindrical platen 2, the latterhaving an ax e 3, upon which it is journaled in the' ends of a platenframe which also com risesa paper-shelf 4. The paper-shelf inc inesforwardly and downwardly and in rear of the platen and is pron(ged at 5to-curve forwardly around the in common use on said machine. Upon theends of the platen are provided annular recesses or bearings 8 toreceive loosely a air of collars or ring-like 3ournals 9, the

- 'tter rigidly connected by a bar 110, which extends alo the platen andclose thereto, which bar is eveled alongits rear edge, to facilitate itsintroduction between the platen and the yielding reassure-rolls 6, 7.The

Fig. 12 is a sectional lan 'of the bar has at itsends ears 11, which arefixed to rotate with the thin strip eXten ing aong the platen from endto end thereof close to said har 10. Along its rear edge the clip isbent inwardly at right angles to forma ledge 16,.which serves as a gagefor the leading edges of the sheets, to square them vto the laten ortobrin them into parallelism wit the print ing ine. From .the oppositeedge of the aper-clip extend tongues 17 .to aid in congithe sheetsagainst the platen, and both the c ip 14 and the tongues 17 conformsubstantially to the curvature of the platen.

Upon the clip at oneendis provided an ear 18 from which projects a pin19 normally occupying a recess 20 in an L-shaped plate 21, whichconstitutes a trip or late After the sheets 22 are introduced into theclip, Fig. 3, the operator depresses a key 23, which moves said tri fromthe Fi 5 to the Fig. 6 position, therehy releasing t 1e clip 14, whichis caused by springs 15 to press the sheets 22 against the platen, saidspringbeing tensioned to throw the clip against the platen and beingnormally restrained by the trip 21 a I 1 I It will be observed, that thefinger-piece 23 is provided upon the to ofa plunger 24 suitably mounteduponftlie platen frame end 25 to slide downwardly, and returned tonormalposition by a spring 26. The tri .plate'2lis'carried u on the end of ahorizontal plunger 27 sliding in a hollow stud 28, the latter securedupon a vertical wall 29 of the platen frame end; rotation of the tribein prevented by a pin 21.

ob 'qlue cam edge 30 is formed upon the vertic sliding plun er 24, toengage a pin 31 projecting from t e trip plunger 27, and thereby forcesaid plunger and trip from the Fig. '5 to theFig. fi position, thusreleasing the projecting pin 19, and permitting the clip to snap towardthe platen. When the key23 is released, a spring 32, Fig.12, returns thetrip 21 to normal position.

The springs 15 not only throw the clip.

-with toothed wheels 34, which are fixed upon the platen, whereby theclip is forced platen. A Wheel 34 is rovided at each end of the platen,Fig. 4.

he construction of each laten end is illustrated at Fig. 9, at which1t-will be seen that the collar or hub 9 is loosely mounted upon a rimor flange 35 formed upon the wheel '34, the-latter secured upon thelatch core 36 by means of pins 37. A dis -cap 38 is sescrews upon theplaten frame head 40 to retain the collar 9.

The clip structure .is thin, and hugs close to the. laten, so that therolls 6 and 7 may ride eas' y t'hereov'er. The sheets are all held bythe clip inthe original position to which they ixfere adjusted upon theplaten until, during the rotation of the platen, the sheets are safelyintroduced between the pa erguidin devices and the platen, so that t eorigina alinement and gaging of the sheets upon the platen remainsundisturbed. After con ducting theleading edges of the sheets up pastthe printing point, the projection 19 upon the clip comes intoengagement with a cam edge 41, which is mounted at the upper side of theplaten and curves eccentrically thereto, so as to force the projection19 outwardly or radially away from the laten, and hence to open theclip, Fig. 7. The cam edge 41 is formed upon a plate 42, which issecured upon studs 43, 44, projecting inwardly from the wall 29 of theplaten frame. A back check pawl 45, Fig. 1, pivoted u on a stud 46,carried upon the wall 29 o the platen frame, is pressed by a spring 47against the cam 41, to be engaged by the projection 19 to arrest theopen clip in case the platen should be turned backwardly, so that thecomparatively frail structure of the clip .may not become injured byforcing it down against the usual platen scale and paperguiding devices.As theplaten continues to rotate forwardly'after the leading edges ofthe sheets 22 are released by the clip, the clip pin 19 continues toride rearwardly along the curved upper edge of the bar 42, and passesonto the edge 48 of the trip plate 21, said edge 48 forming a substantialcontinuation ofthe curved cam edge 41,, by means of which the cli isheld open against the tension-of the springs 15. I finger or guard 49uponthe cam plate projects into the path of the pin 19, and arrests theclip; the platenthereafter continuin to revolve while the clip remainsidle an ,stationary. The springs 15 force the in 19 into the notch 20 inthe trip, where y the clip is held against accidental rotation eitherforwardlyor backwardly.

I provide a horn 50 to extend forwardly from the paper shelf- 4 abovethe 0 en clip 14, Fig. 2, and to a point well forwar ofthe clip whenthelatter is in normal position, so that the side edges of thesheets-22 maybe gaged of said trip.

independently of the clip, a spring to press the clip toward or againstthe platen, means 0 er'ated'by the spring to connect the clip'to t elaten to revolve therewith, and means rem ered efiective by therevolution of the platen to throw the cli away from the platen in.opposition to t e tension of said spring.

2. In a typev. riting machine, the combination w ith a revoluble platen,of a paper clip extending therealong and supported so as to permitcontinued revolutions of the platen independently of the clip, a springto press the clip towardor against the platen, means operated by thespring to connect the clip to t e laten to revolve therewith, and meansren ered effective b the revolution of the platen to throw the c ip awayfrom the platen in opposition to the tension of said spring, and todisconnect the clipfrom the platen and hold it stationary duringsubsequent revolution of the platen.

3. In a typewriting machine, the combination with a revoluble platen, ofa paper clip extending therealong, a spring tensioned to sWingthe clipagainst the platen, a trip restraining the clip, and means operated bythe spring to connect the clip to the platen to revolve therewith uponthe release of the clip from said trip. I Y

4. In a typewriting machine, the combination with a revoluble platen, ofa paper clip extending therealong, a spring tensioned-to swing the'clipagainst the platen, a trip re-- vstraining the clip, means operated bythe spring to connect the clip to the laten to revolve therewith upon reease of t e clip from said trip, and means to move the clip away fromthe platen and restore. it to the 5. In a typewritin machine, thecombination with a revolub e platen and a platen,

extending along the frame, of a paper cli platen and sup orter to permitcontinued revolutions of t e platen independently of the clip, afinger-piece mounted upon the platen frame, means 0 erable by saidfingerpiece to cause the clip to bear against the platen or the paperthereon, and means called into action h platen to efi'ectthe' elease ofthe clip.

6. In a typewriting machine, the combination with a revoluble platen, ofa paper clip control the revolution of theextending therealong, a springtensioned to swing the clip against the platen, a trip restraining the cip, a finger-piece having means to operate said trip, means operated bythe spring to connect the clip to the p aten to revolve therewith uponrelease of the clip from said trip, and means to return the trip andfinger piece to normal positions.

7. In a typewriting machine, 'the combination with a revoluble platen,of a paper clip extending therealong, a spring tensioned to swing theclip against the platen, a trip restraining the clip, and connected to afingerpiece, means operated by the spring to connect the clip to theplaten to revolve therewith upon release of the clip from said trip, andmeans dependent upon the revolution of the platen to move the clip awayfrom the platen and restore it to the control of said trip. I

8. In a typewriting machine, the combination with a revoluble platen, ofa paper clip extending therealong, a spring tensioned to swing the clipagainst the platen, a trip restraining the clip, means operated by thespring to connect the clip to the platen to revolve therewith u on therelease of the clip from said trip, an a cam mounted upon the platenframe in the path of a part upon said clip,and shaped to liftthe cliplaten during the revolution'of t e latter.

9. In a typewriting machine, the combina- .tion with a revoluble platen,of. a paper clip extending therealong, a spring tensioned to swing theclip against the platen, a trip restraining the clip, means operated bythe spring to connect the clip. to the platen to revolve therewith uponrelease of the clip from said trip, and a cam mounted upon the platenframe in the path of apart upon said- 'clip, and shaped to lift the clipfrom the platen during the revolution of the latter; said cammounted inposition'to release the clip after the latter has advanced past theprinting line duringithe first revolution of the platen.

10. In a typewritin machine, the combination with a revolub e platen anda platen frame, of a paper clip mounted so that the platen may )e'rotated independently of the clip, a s ring tensioned to throw the clipagainst t e platen, releasable means restraining the clip from actingunder the influence of said spring, a tooth upon the clip to engageteeth upon the 'laten when-the clip is thrown against the p aten, a cammounted upon the platen frame, and a projection upon the clip to beengaged by the cam during the revolution of the platen, to lift'the clipfrom the platen and disconnect the clip tooth from the laten, andto'restore the clip to the contro of said releasable means.

11. In a typewritin machine, the combination with a revolubl e platenand a platen frame, of a clip extending along the platen butdisconnected therefrom, a finger-piece mounted upon the platen frame,means controlled by said finger piece for moving the clip against theplaten and connecting the clip to the platen to revolve therewith, andmeans dependent upon the revolution of the platen for lifting the clip'so that the platen may continue to revolve independently of. the clip.

12. n a typewriting machine, the combination with a revoluble platen, ofa clip extending therealong, a spring tensioned to swing the clipagainst the platen, a trip restraining the clip, means operated by thespring to connect the clipto the platen to revolve therewith uponrelease of the clip from saidtrip, and a cam mounted upon the platenframe in the path of a part upon said clip, and shaped to lift the clipfrom the platen during the revolution of the latter; said cam mounted inposition to release the clip after the latter has advanced past theprinting line during-the first revolution of the platen; said 'triforming a substantial continuation of sai cam, and a finger-piececonnected to said cam to move it laterally to release the clip.

13. In a typewriting machine, the combination with a revoluble platen,of a paper clip extending therealong, a spring tensloned 'to swing theclip against the platen, a trip.

restraining the clip, means operated by the spring to connect the clipto the laten to revolve therewith .upon release 0 the clip from saidtrip, and a cam mounted upon the platen framein the path of a rojec'tionupon said clip, and shaped to lift t e clip from the platen duringtherevolution of the latter; said cam mounted in position to release theclip after the latter has advanced past the prlnting line during thefirst revolution of the platen; said tri forming a substantial con-.tinuation of mi cam, and a finger-piece con nected to said cam to moveit laterally to release the clip; said tri'p having a finger in the pathof sald projection to arrest the clip.

14. In a typewriti machine, the combination with a revoluble platen anda platen frame, of a paper'clip extending along the platen, a springupon said paper clip and tensioned to swing the same against the platen,a trip mounted upon the laten frame toengage a projection upon sa1 011pand restrain it from either swinging to the platen lunger mounted uponthe platen frame" an having a fingerp1ece,means for enabling saidplunger to cam the trip to inoperative position, and resilient means toreturn the plunger and trip to normal positions.

t 15. In a typewritin machine, the combination with a revolub e platenand a platen frame, of a paper clip extendin alon the platen, a springupon said paper 0 an tensioned to swing t e same against t e platen,

aper

a trip mounted upon the platen frame to engage a projection upon saidclip and restrain it from either swin ing to the platen or rotatingtherewith, a p unger mounted upon the platen frame and having afinger-piece, means for enabling said plunger to cam the trip toinoperative means to return the p unger and trip to nors ring-pressedplunger mova le-crosswisdto t e direction ofvmovement of the first plunger.

16. In a typewriting machine, the comb nation with a revoluble platenand a-platen platen, a spring upon said paper 0 ip and tensioned toswing the same against the platen, a trip mounted upon the platen frameto engage a projection upon said clip and restrain it from eitherswinging to the platen or rotatin therewith, a plunger mounted upon thep aten frame and having a finger-piece, means for enabling said plungerto cam the trip to inoperative position, and resilient means to returnthe plunger and trip to normal positions; said trip being-provided upona spring-pressed plunger movable crosswise to the direction of movementof the first plunger, and said camming means including a cam providedupon the first plunger, and a pin pro'eeting from the second plungerinto the pat of said cam.

17. The combination of a revoluble platen, a paper clip extending alongthe same, and mounted to revolve therewith, the platen being revolubleindependently of the clip, means to connect and disconnect the clipfromthe platen, and means to prevent the clip from rotating backwardlywith the platen.

18. The combination of a revoluble platen, a paper clip extendin alongthe same, and mounted to revo ve therewith, the platen being revolubleinde 'endently of; the clip, means to connect an disconnect the clipfrom the platen, and a check, as 45, and a projection, as 19, on-theclip to enga e said check to arrest the clip during the bac wardrotation of the platen"; the check being movable and mounted to permitthe passage of the projection during the advance rotation ofthe aten.

19. na typewritin mahine, the,combiframe, of a e rotated independentlyof the tensioned to throw the clip osition, and resilient frame, of apaper clip extendin along "the mal positions; said trip being rovidedupon a nation with a revolub e platen and a platen i clip, a springagainst t e p aten, releasable means restraining the clip from actingunder the influence of said spring, .a, tooth upon the clip to'engageteethg-upon the platen when the clip is thrown against the platen, a cammounted upon the platen frame, and a projection upon thecli'pto be engaed by the cam durin the revo tionof the p aten, to lift the clip om .theplaten and disconnect the .clip tooth from the platen, and to restorethe clip to the control of said trip; a back check pawl being mounted inthe path of said projection to permit forward rotation of the clip withthe platen but to arrest the clip during the backward rotation'of theplaten.

20. In a typewriting machine, the combination with a revoluble platenand a platen frame, of a aper clip mounted so that the platen may lierotated independently of the clip, a s ring tensioned to throw the clipagainst t e platen, releasable means restraining the clip from actingunder the influence of said spring,a tooth u on the clip to engage teethupon the platen W en the clip is thrown against the platen, a cammounted upon the platen frame, and a projection upon the clip to beengaged by the cam during the revolution of the platen, to lift the clipfrom the platen and disconnect the cli tooth from the platen, and torestore the clip .to the control of said trip; a back check pawl beingmounted in the path of said projection to permit forward rotation of theclip with the laten but to arrest the clip during the bac ward rotationof the platen; said pawl mounted to be effective at about the releasingpoint of the cli 21. In a typewriting machine, the combination with arevoluble platen,-of a clip having a collar or hoop, whereby it ismounted to revolve with the platen, the platen being revolubleindependently of the clip, and a friction device between the collar andthe platen.

22. In a typewriting machine and in combination, a revoluble platenhaving a cylindrical uninterrupted printing surface, a bar extendingalong said platen, means for supporting the said bar at its ends topermit continued revolutions of the platen independently of the bar,means operable at the will of the operator for connecting the bar to theplaten to revolve therewith, a paper-clip carried by said bar, means forcausing said clip to press the paper directly against theprinting-surface of the laten, and a friction device between the p atenand the bar supporting means.

23. Ina typewriting machine and in combination, a revoluble platenhaving a cylindrical uninterrupted printing-surface, a paper-clipextending along said platen, means nation with a revoluble platen, of apaper clip extending therealong, a spring tensioned to swing the cliagainst the platen, a trip restraining the c ip, and means operated bythe s )ring to connect the clip to the platen to revoive therewith uponrelease of the clip from said trip; means being provided to preventaccidental movement of the clip either forward or backward along theplaten when the cli is under the restraint of said trip.

25. n a typewriting machine, the combination with a revoluble platen, ofa paper clip extending therealong, a spring tensioned to swing the clipagainst the platen, a trip restraining the clip, a finger-piece havingmeans to operate said trip, means operated by the spring to connect theclip to the laten to revolve therewith upon release of t eclip from saidtrip, and means to return the trip and finger-piece to normal positions;said trip also having means to prevent accidental movement of the clipin either forward or backward direction around the platen.

26. In a typewriting machine, the combination with a platen and a latenframe, of a clip extendin along the p aten, the platen being revolub eindependently of the clip, a

s ring tensioned to swing the clip against the p aten, a finger-keyprovided upon the platen ame to release the clip, means also beingcontrolled by said finger key to connect the clip to the platen, andmeans to release the sheets.

HARRY S. MGCORMACK. Witnesses:

D. M. ALHIRE, S. T. SMITH.

